Life extender for incandescent light bulbs



FIG. 1 is a perspective view of a life extender for incandescent light bulbs showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof; and

FIG. 4 is a bottom view thereof. 

The ornamental design for a life extender for incandescent light bulbs, as shown. 